Brennan Heating & Cooling IncHVAC contractor in Great Falls, MT

#21Ranked #21 of 31 HVAC contractors in Great Falls

Brennan Heating & Cooling Inc is an HVAC contractor at 815 21st St NW, Great Falls, MT 59404, ranked #21 of 31 HVAC contractors in Great Falls and rated 4.5 from 17 Google reviews. Open Monday to Friday.

Great Falls, MTUpdated October 22, 20260 paid placements in any rankingHow we rank

Call (406) 452-1133Website ↗

Key facts

Key facts about Brennan Heating & Cooling Inc
Address	815 21st St NW, Great Falls, MT 59404Get directions
Phone	(406) 452-1133
Website	brennanhc.com
Hours	Monday to Friday: 8 AM – 4:30 PM
Google rating	4.5 from 17 Google reviews

Trades

Each trade shows the evidence we matched it on.

HVACmain tradeGoogle main category

Service area

Based in Great Falls, MTView on map

Opening hours

Opening hours for Brennan Heating & Cooling Inc
Day	Hours
Monday	8 AM – 4:30 PM
Tuesday	8 AM – 4:30 PM
Wednesday	8 AM – 4:30 PM
Thursday	8 AM – 4:30 PM
Friday	8 AM – 4:30 PM
Saturday	Closed
Sunday	Closed

Open evenings — no
Open Saturdays — no
Open Sundays — no

Typical heating and cooling prices

Typical heating and cooling prices
Job	Low	Typical	High
AC replacementPer system, installed (unit plus labor); typical range of customer-reported jobs. US national range	$3,887	$5,978	$8,073
Furnace replacementPer system, installed; typical range of customer-reported jobs. US national range	$2,823	$4,814	$6,896

Market ranges for the trade, checked October 2026, not a quote from this business. Ask for a written estimate.

Compare nearby HVAC contractors

Brennan Heating & Cooling Inc compared with nearby businesses
Business	Rank	CR Score	Google rating	License verified	Saturday	Sunday	Distance away
Brennan Heating & Cooling Inc (this business)	—	55	4.5 (17)	—	No	No
Palagi Plumbing & Heating Inc	#19	56	5.0 (5)	—	—	—	3.0 mi
Air Tech Heating and Cooling	#20	56	4.3 (6)	—	—	—	3.6 mi
Dave's Sheet Metal Heating & Cooling	#22	53	4.7 (6)	—	No	No	3.8 mi

See all 31 ranked HVAC contractors in Great Falls

Reviews

ContractorsRanked reviews

No ContractorsRanked reviews yet

Google

4.5from 17 Google reviews

Hired Brennan Heating & Cooling Inc? Write a review

Questions about Brennan Heating & Cooling Inc

How is Brennan Heating & Cooling Inc ranked in Great Falls?

Brennan Heating & Cooling Inc is ranked #21 of 31 HVAC contractors in Great Falls by CR Score, with 55 out of 100 as of October 2026. The score weighs reputation, credentials, review volume, recency, availability, trade focus, proximity, claimed profile, partnered and ContractorsRanked reviews. No business can pay to change its rank.

What are Brennan Heating & Cooling Inc’s hours?

Brennan Heating & Cooling Inc is open Monday to Friday. Its listed hours are Monday to Friday, 8 AM – 4:30 PM. It is closed on Saturdays and closed on Sundays. Hours come from the business listing; holiday hours may differ.

What do Google reviews say about Brennan Heating & Cooling Inc?

Brennan Heating & Cooling Inc has a rating of 4.5 from 17 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

How do I contact Brennan Heating & Cooling Inc?

Call Brennan Heating & Cooling Inc on (406) 452-1133. The business is at 815 21st St NW, Great Falls, MT 59404. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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